Re the wonderful PayPal Developer controls 

You will need to download them, install them, add some code to your web.config (per instructions) open VWD and choose Website/Add Reference and check the new PayPal control listing, then go to Tools/Choose Toolbox Items and check the new PayPal controls, which will then populate the bottom of your toolbox.

One more step!  You'll also need to upload the PayPal control dll file from your computer to your Web site's Bin folder.